// 存数据
export const setItem = (key, value) => {
  if (typeof value === 'object') { 
    value = JSON.stringify(value)
  }
  window.localStorage.setItem(key, value)
}


// 取数据
export const getItem = key => { 
  const data = window.localStorage.getItem(key)
  try { 
    return JSON.parse(data)
  } catch (err) {
    return data
  }
}